I prefer to write more findings about this topic in this thread instead.
The thing is I found that this problem is more related with the Draft Grid tool, apparently.
When the Draft Grid is ON, the Transformation tool cannot be rotated in X,Y,Z axes. Please see the video:
I don't know if this a bug or the Grid is a limitation of Transf Tooll (including z-axis rotation).

I prefer to write more findings about this topic in this thread instead.
The thing is I found that this problem is more related with the Draft Grid tool, apparently.
When the Draft Grid is ON, the Transformation tool cannot be rotated in X,Y,Z axes.

I think this is only useful if it is consequently implemented as a 'parameterizable feature' shown and editable from the 'design-tree'.
I have seen (in some tutorial) people apply transforms also to sketches, again the interface to this would need to be reliably trackable and editable (removable). One easy and obvious transform I find missing is the 'offset' relation applicable for all sketch driven features. The field could always be there and default to 0...
Thanks for forwarding and/or implementing this, I am a total beginner - wouldn't know how to help it yet!